Paramagnetic magnetization signals and curious metastable behaviour in field-cooled magnetization of a single crystal of superconductor 2H-NbSe2. (8th July 2015)

• Record Type: Journal Article
• Authors: Kumar, Santosh; Tomy, C V; Balakrishnan, G; Paul, D McK; Grover, A K
• Is Part Of: Journal of physics. Volume 27:Number 29(2015)
• Publication Date: 2015-07-08
• Subjects: field-cooled magnetization response in superconductors -- paramagnetic magnetization response -- metastability effects; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/0953-8984/27/29/295701
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We present here some newer characteristics pertaining to paramagnetic Meissner effect like response in a single crystal of the low superconducting compound 2H- via a detailed study of effects of perturbation on the field-cooled magnetization response. In the temperature range, where an anomalous paramagnetic magnetization occurs, the field-cooled magnetization response is found to be highly metastable: it displays a curious tendency to switch randomly from a given paramagnetic value to a diamagnetic or to a different paramagnetic value, when the system is perturbed by an impulse of an externally applied ac magnetic field. The new facets revealed in a single crystal of 2H- surprisingly bear a marked resemblance with the characteristics of magnetization behaviour anticipated for the giant vortex states with multiple flux quanta (, , ) predicted to occur in mesoscopic-sized superconducting specimen and possible transitions amongst such states.